I also think in Chapter 4 Lizzy is referring to compliments directed to her. I have not taken this comment as pride in her ability to read people but instead one that reflects confidence in herself; that she knows she is a desirable woman. I think Lizzy knows her own worth and is therefore unsurprised when another person does too while Jane is too modest to know her own worth and is then surprised when she receives compliments. Lizzy is pointing out a great difference between her character and Jane’s and then goes on to tell Jane that she is also worthy. Jane attributes Bingley’s second set with her to his gallantry rather than her attributes but Lizzy points out the opposite; that Bingley saw Jane was five times as pretty as every other woman in the room. His wanting to dance with her again then is naturally a result of her beauty (and I should think her sweetness) and not his gallantry. Jane is as blind to her own desirability as she is to the follies and nonsense of others. I think the irony remains in that Lizzy knows very well that as a woman, she is worth the attention of any man but in Chapter 6 she fails to see Darcy’s interest in her and even believes he listens and watches her with a satirical eye. I agree with Line. Lizzy has the word of the horse himself in believing Darcy does not find her attractive so despite her confidence she misinterprets his attentions. ;D